Train spotting

A railfan, rail buff, or train buff (American English), railway enthusiast or railway buff (Australian/British English), trainspotter or anorak (British English), or foamer (pejorative for American railroaders), is a person interested in a recreational capacity in rail transport. Railfans of many ages can be found worldwide. Railfans often combine their interest with other hobbies, especially photography and videography, radio scanning, model railroading, studying railroad history and participating in train station and preservation efforts. Magazines dedicated to railfanning include Trains and Railfan & Railroad.

The term metrophile is used by some to identify a railfan with a particular interest in metro (subway, underground) systems. The study of railways, or a general interest in them as a hobby, is sometimes jocularly known as "" (literally, "study of iron horses").

In the UK, railfans are sometimes called trainspotters or anoraks. The term gricer has been used in the UK since at least 1969, and is "Said to have been current in 1938 amongst members of the Manchester Locomotive Society", according to the Oxford English Dictionary. There has been speculation that the term derives from "grouser", one who collects dead grouse after a shoot, but other etymologies have also been suggested. In Northern Ireland and the Republic of Ireland, however, the term Gricer has become increasingly popular within the Railway Enthusiast Community, with Griceling being used for younger enthusiasts.

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Wikipedia